<div style="text-align:center">
    <div id="chartContainer" style="height:200px; width: 400px; margin: 0 auto; display:inline-block"></div>
    <div id="pieChartContainer" style="height:200px; width: 400px; margin: 0 auto; display:inline-block"></div>
</div>
<div style="margin:5px; text-align:center">
    <div id="voteJohnButton" style="height: 40px"></div>
    <div id="voteMikeButton" style="height: 40px"></div>
</div>